Snake could be doing voicework as background character or support for raiden. I dont think there will be 2 character representative from a series, especially a 3rd party guest series.You can tell its Evil Cole by his skin tone. Thats the way your skin changes in Infamous 2 when you become fully evil. It seems exactly the same to me.
Assuming theres 24 characters total, and this roster is legit(which I highly doubt). That would leave 4 more slots. Snake is pretty much already confirmed as David Hayter is doing voice work for the game. So thats 3 more characters.
How could you not want Nariko??? She would be a very interesting character visually. Shes Sony strongest heroine, and shes dead Sexy. She my most wanted niche character, and Sir Dan as 2nd most.